ServiceStack：由于未知原因不断收到 HTTP 500 错误

Question

突然间，我在自托管的 ServiceStack WS 中不断收到 HTTP 500 错误。

我有几个请求已经到位，它们工作正常，但这个就是行不通。我已经像这样添加了我的许可证：

    private void StartServiceStackService()
    {
        Licensing.RegisterLicenseFromFileIfExists("servicestack-license.txt".MapHostAbsolutePath());

        _serviceStackHost = new ServiceStackWsHost(this, _frontEndModuleParameters, _alfaWebServicesSettings);
        _serviceStackHost.Init();
        if (!Debugger.IsAttached)
        {
            _serviceStackHost.Start(new[] { "http://+:8080/" });
        }
        else
        {
            _serviceStackHost.Start(new[] { "http://+:8081/" });
        }
    }

失败的服务是：

[Route(Bookings.BASE_PATH + "search", Verbs = "GET")]
public class SearchAddress : IReturn<SearchAddressResponse>
{
    public string SearchString { get; set; }
}

public class SearchAddressResponse : ResponseBase
{
    public string Test { get; set; }
    // public List<Address> Addresses { get; set; }
}

internal class SearchAddressHandler : ServiceHandlerBase
{
    public SearchAddressResponse Get(SearchAddress searchAddress)
    {
        return new SearchAddressResponse()
        {
            Test = "ASDASDASD"
        };
    }
}

我使用 Fiddler4 调用它是这样的：

GET http://192.168.0.147:8081/alfaonline/bookings/search?SearchString=123 HTTP/1.1
User-Agent: Fiddler
Host: 192.168.0.147:8081
AuthToken: a18b613c-23b2-4f4e-8934-ad8d6cbc57bb
DeviceUUID: 1baaace

并得到这个回复：

HTTP/1.1 500 Internal Server Error
Transfer-Encoding: chunked
Content-Type: text/html
Vary: Accept
Server: Microsoft-HTTPAPI/2.0
X-Powered-By: ServiceStack/5.20 Net45/Windows
Date: Wed, 26 Sep 2018 11:28:31 GMT

0

如果我改为 return "null"，像这样：

[MyAuthenticate]
internal class SearchAddressHandler : ServiceHandlerBase
{
    public SearchAddressResponse Get(SearchAddress searchAddress)
    {
        return null;
    }
}

Fiddler 给我 HTTP 204 OK:

HTTP/1.1 204 OK
Content-Length: 0
Vary: Accept
Server: Microsoft-HTTPAPI/2.0
X-Powered-By: ServiceStack/5.20 Net45/Windows
Date: Wed, 26 Sep 2018 11:26:29 GMT

我在调试模式下的 VS 中没有看到任何错误和异常，在异常设置中 "catch all"。我可以在处理程序中放置一个断点，它会在那里中断，因此会执行正确的处理程序。

更新我一直在使用 Fiddler，现在运行ning Fiddler4。当我尝试下面描述的服务时，例如 swagger（ServiceStack 的插件），它按预期运行s。如果我运行 Postman 中的服务，它会按预期运行s。但是如果我在 Fiddler 中运行它，我会得到 HTTP 500

UPDATE 2 我也刚刚注意到转到 http://127.0.0.1:8081/requestlogs 也会产生 HTTP 500 错误。更具体地说，当我访问 /requestlogs 并添加 UncaughtExceptionHandlers 时，我看到了这个错误：

System.MissingMethodException: Method not found: 'System.String ServiceStack.StringUtils.HtmlEncodeLite(System.String)'. at ServiceStack.Formats.HtmlFormat.d__10.MoveNext() at System.Runtime.CompilerServices.AsyncTaskMethodBuilder.Start[TStateMachine](TStateMachine& stateMachine) at ServiceStack.Formats.HtmlFormat.SerializeToStreamAsync(IRequest req, Object response, Stream outputStream) at ServiceStack.HttpResponseExtensionsInternal.d__7.MoveNext()

Answer 1

您的第一个方法应该是获取有关错误的信息：

如果尚未在响应 DTO 中包含 ResponseStatus 属性，
启用Config.DebugMode
添加Debug Logging
注册Exception Handlers。

ServiceStack：由于未知原因不断收到 HTTP 500 错误

ServiceStack: Keep getting HTTP 500 errors for unknown reason

http-error

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